Moved to Mono

[Simon Pepper]

Hi all

I took my first ever mono image last night and I don't think its come out that bad. However the stars are not pin point I seem to have some slight coma on the left its coma to left and on the right its coma to right. They also all seem to have a slight upward/downward stretch. Is this a back focus issue? ZWO state it should be 56mm I have everything in the imaging train but when I measure it I think its 54mm. See some closeups below but I have also attached the xisf from PI. Any help or suggestions would be appreciated. 

 

 

NGC7000.xisf

[Simon Pepper]

This is the XISF with just a nuke stretch applied no other work done to it. Perhaps I am being a pixel peeper...